Device for stretching iron bands of packing-cases.



E. BLAUVAG.

DEVICE FOR STRETOHING IRON BANDS 0F PACKING GASES,

APPLIOATION FILED JULY 20, 1908.

i S I 1 Palaented Apr. 6

77 i'i7zesses:

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EUGENE BLAUVAO, OF PARIS, FRANCE.

DEVICE FOR STRETOHTNG- IRON BANDS OF PACKING-CASES.

Specification of Letters Patent.

Patented April 6, 1909.

Application filed July 20, 1908. Serial No. 4%,524.

To all whom it may concern:

Be it known that l, Ens-nun BLAUVAC, citizen of the French Republic,residing Paris, in the Department of the Seine, France, have inventedcertain ne v and useful Improvements in Devices for Stretching; the IronBands of Paclrirmfiases, of which the following is it specification.

This invention refers to an improved apperatus for stretching the ironbends, wires or the like generally employed for closing packing cases.

This invention depends on mechanically drawing together in any suitablemanner two carriages running on rollers or the like. These carriages areguided by one or more guides or slides and may, if desired, run onrails; each otthese carriages is titted with it suitable device forcatching hold of on end of the iron bend, wire or means employed forclosing the case. i h chanically drawn toward each other by any suitablemeans and as examples the eccompanying' drawings show two modificationsof an arrangement, but it must be clearly und erstood. that thesearrangements permitting of eftecting the desired result may be varied inmany ways without in any we y changing the fundamental principle of theinvention which essentially consists in the application oi rollers forthe stretching carriages.

Figure 1 of the drawing; annexed to the present description shows a.side view ol :1. stretching device with oppositely threaded screw. Fig.2 is :1 plan view of the some. Fig. 3 shows at side view of amodification with springs.

Referring to the accompanying d rawing's, 1 indicates the curri ges, 2the rollers, 3 the guides for the car QIGS, 4 the frame, 5 theoppositely thre ed screw, 6 the spring; in the modification, 7 thesocket maintaining the pin 8 on which the spring 6 is wound, which pinis controlled by :t lever, l'ly wheel or other suitable means, 9 thesquare or rectenguler shaped part for opera ting the screw 5. 10 thearrangement for catching hold of the ends of the band irons 11.

As already referred to above, the example The cerria 'es cen be meshownin Figs. 1 and 2 shows on oppositelyt:

threaded screw which can be rotated by means of a nut :irrrene'edbetween the two screw threads, or in any other suitable manner by meansof a fly wheel, lever or suitable gear.

Fig. 3 shows modification in which the carriages drawn toward each otherby means of springs or metal blades, but cables, chains, cords or thelike may be substituted for the some. These springs, blades or the likeere attached by one of their ends to tho carriages end by the other endto the pivot and wind on to the pivot or )in 8 like on to a winch, es inthe known stretching devices. The carriages may also be provided withsprings 12 r the like for drawing them back into their initial positionotter having been operated.

The two ends of the bend iron being brought into contact with eachother, one above th other, are joined together by means of rivets orother suitable means; it will. be easily understood that e. stretching;device thus constructed, when placed on a crise'permits of uniformlytightening up the iron bond, is more easily operated and gives a betterresult than the known sppsretus, owing to the presence of any suitablenumber of rollers under the carriages provided with the devices forseizing the band.

(llaim An apparatus l orstretchinrz or tightening; iron bends comprisinga p. of blocks each having at pair of rollers extending transverselyacross its bottom face near the edge or corner thereof, means on eachblock to receive the end of the band to be tightened, a. comperrt tivelylight flexible frame for guiding said blocks in movement toward end fromone another, and means for positively impelling said blocks toward oneanother when desired.

in testimony woereof l alliX signature in presence of two witnesses.

EUGENE B LAUVAC.

Witnesses:

LnornN Cnnsrnv, CHARLES DILIL.

